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生态学杂志 ›› 2011, Vol. 30 ›› Issue (01): 77-81.

• 研究报告 • 上一篇    下一篇

松嫩平原草甸三种植物叶片N、P化学计量特征及其与土壤N、P浓度的关系

丁 凡1,2,廉培勇1,2,曾德慧1**   

  1. 1中国科学院沈阳应用生态研究所,沈阳 110016;2中国科学院研究生院, 北京 100049
  • 出版日期:2011-01-08 发布日期:2011-01-08

Characteristics of plant leaf nitrogen and phosphorus stoichiometry in relation to soil nitrogen and phosphorus concentrations in Songnen Plain meadow.

DING Fan1,2, LIAN Pei-yong1,2, ZENG De-hui1**   

  1. 1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China|2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Online:2011-01-08 Published:2011-01-08

摘要: 测定了松嫩平原草甸3种主要植物羊草(Leymus chinensis)、芦苇(Phragmites communis)和尖叶胡枝子(Lespedeza hedysaroides)叶片全氮、全磷浓度,并分析了它们与土壤全氮、全磷浓度的关系。结果表明:3种植物叶片全氮浓度种间差异显著(P<0.05),而全磷浓度种间差异不显著(P>0.05);3种植物叶片全氮浓度与土壤全氮浓度相关性不显著(P>0.05),而叶片氮磷比与土壤全磷浓度均呈显著负相关(P<0.05);表明同一地区,不同植物叶片全氮浓度差异较大,而全磷浓度差异较小;与叶片全氮、全磷浓度相比,叶片氮磷比受土壤养分的影响更显著;另外,该地区羊草和尖叶胡枝子生长受到磷限制,可考虑适当施用磷肥。

关键词: 浮游植物, 赤潮, 丰度, 水动力, 长江口

Abstract: We measured total nitrogen (N) and total phosphorus (P) concentrations in leaves of Leymus chinensis, Phragmites communis and  Lespedeza hedysaroides in Songnen Plain meadow, and analyzed their relationship with soil total N and total P concentrations. The results showed that foliar total N concentration differed significantly among three species (P<0.05), while foliar total P concentrations did not show significant difference (P>0.05). The leaf N concentration of the three species had no significant correlation with soil total N concentrations (P>0.05), while the leaf N:P ratio was significantly negatively correlated with soil total P concentrations (P<0.05), suggesting that in our study area, different plant species had great difference in their leaf N concentration, but less difference in their leaf P concentration. Compared with leaf N and P concentrations, leaf N:P ratio was more related to soil N and P concentrations. In addition, the growth of Leymus chinensis and Lespedeza hedysaroides in study area was P-limited, and thereby, appropriate application of P fertilizer could be considered.

Key words: Phytoplankton, Red tide, Abundance, Water dynamics, Changjiang River estuary